[(2-cyano-1-cyclopropylmethyl-2-hydroxy)ethyl]carbamic acid tert-butyl ester

{(S)-1-[(1R,2S,5S)-2-(2-Carbamoyl-1-cyclopropylmethyl-2-hydroxy-ethylcarbamoyl)-6,6-dimethyl-3-aza-bicyclo[3.1.0]hexane-3-carbonyl]-2,2-dimethyl-propyl}-carbamic acid tert-butyl ester